An f/11 "Twindar" lens with front cell focussing is fitted in the three speed shutter of the camera shown above, the basic variant having a fixed-focus "Doublet" lens. A pivoting brilliant waistlevel viewfinder is fitted on the shutter housing, though later cameras with the f/6.3 lens had a folding frame finder as well, see the "Model D" detail below. Earlier cameras have a folding key for winding the film. Later models were fitted with a film winding knob and a sliding cover for the red window on the back. At some point in the production, the camera back lock also changed, from a sliding catch to a pivoting latch, as shown at the bottom of the page.